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- W2573301515 abstract "In all of the existing block-based image and video coding standards, blocks are processed in the fixed scan order. Then in HEVC intra coding, intra prediction is always based on the top and/or left neighboring reconstructed pixels, which incurs less accurate prediction for blocks where the spatial correlation is not along the topleft-to-bottomright direction. To obtain better intra prediction, we propose to flexibly determine the coding order of blocks in HEVC intra coding. Complying with the hierarchical quadtree structure in HEVC, our flexible block ordering (FBO) technique recursively decides the coding order of four sub-blocks when splitting one block. Moreover, we propose new methods to perform inter/extrapolation for intra prediction so as to fully utilize neighboring reconstructed pixels, not always being top/left. Experimental results show that our proposed FBO technique achieves on average 2.9% BD-rate reduction compared to HEVC baseline." @default.
- W2573301515 created "2017-01-26" @default.
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- W2573301515 date "2016-11-01" @default.
- W2573301515 modified "2023-09-27" @default.
- W2573301515 title "Hierarchical quadtree-based flexible block ordering in HEVC intra coding" @default.
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- W2573301515 doi "https://doi.org/10.1109/vcip.2016.7805486" @default.
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